the handset antenna standards of Telecommunications Operators, who knows?

As far as I know the standard (either GSM or LTE) specifies the overall performance and emission of the device not a component,

THS!
Hi,Shehata.
I know the one,leave the device, it is no use no matter how good the antenna performance.
So, I want to know good or bad performance of cellphones（GSM or WCDMA ） ——wireless standards use darkroom or other equipment.

nobody knowns？